A clickable interactive Fuel chart

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.common.effects.js"></script>
<script src="RGraph.fuel.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="250" height="250">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var fuel = new RGraph.Fuel({
            id: 'cvs',
            min: 0,
            max: 100,
            value: 96,
            options: {
                scaleVisible: true,
                colors: ['Gradient(white:blue)'],
                needleColor: 'blue',
                unitsPost: '%',
                textAccessible: true
            }
        }).draw();
        
        fuel.canvas.onclick = function (e)
        {
            var obj   = e.target.__object__;
            var value = obj.getValue(e);
            
            obj.value = value;
            obj.grow();
        }
    };
</script>